Multiple Random Misfires
August 7th, 2007, 3:46 PM
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Multiple Random Misfires
I have a '96 Chevy Silverado 2 wheel drive 5.7 V8 with about 130K on the motor. The engine light is on and says multiple random misfires when checked by autozone. I have changed the plugs and the wires and I got the Borg Warner Wires and not the cheap ones. This did not fix the problem. I have a new fuel filter and I have run multiple bottles of injector cleaner through the system. The truck is also sluggish when you take off after being stopped for a few seconds. You can feel the miss when you are at astoplight, then when you get on the gas, it's real sluggish for a few seconds, then it takes off and runs smooth like normal. Still has plenty of power after you get it wound up a little bit. The problem has been plaquing me for over 6 months now and it's killing my gas mileage. Does anyone have any other suggestions? Thanks.
August 9th, 2007, 5:35 AM
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RE: Multiple Random Misfires
I had the same problem w/ our 96, ended up being the fuel pressure regulator. Took it to2 different shops, ended up taking it to the local Chevrolet dealership to figure it out.
August 9th, 2007, 1:48 PM
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RE: Multiple Random Misfires
check your plugs to see if u cracked the porcelin...thats what i did...i had over 6,000 misfires in just one cylinder in a 15 mile ride down the highway....i had the EXACT same problems as your did.....my was a hairline crack in my plugs, i must of broke it whan i was putting it in cuz the wrench didnt want to go on there cuz of the shroud around the exhaust manifold in number 1 cylinder....so once i realized what the prob was i took a hammer to the shroud and just folded it over....so now that wont ever happen again
August 9th, 2007, 5:33 PM
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RE: Multiple Random Misfires
ORIGINAL: killuminatii20
i must of broke it whan i was putting it in cuz the wrench didnt want to go on there cuz of the shroud around the exhaust manifold in number 1 cylinder....so once i realized what the prob was i took a hammer to the shroud and just folded it over....so now that wont ever happen again
i must of broke it whan i was putting it in cuz the wrench didnt want to go on there cuz of the shroud around the exhaust manifold in number 1 cylinder....so once i realized what the prob was i took a hammer to the shroud and just folded it over....so now that wont ever happen again
August 20th, 2007, 8:36 AM
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RE: Multiple Random Misfires
It was indeed the fuel pressure regulator. Truck runs like a brand new one now! changing the regulator, easy, getting to the regulator to change it, not so easy. took me about 3 hours. you have to pull the upper intake manifold. Do yourself a favor and replace all the rubber gaskets while you are changing the regulator. They cost about 18 bucks and no added labor really. Thanks!
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